C＃：输入流是不是一个有效的二进制格式

本文介绍了C＃：输入流是不是一个有效的二进制格式的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个问题，在C＃/ ASP.NET，这给确切的错误反序列化：

I have a problem with deserializing in C#/ASP.NET, which gives the exact error:

输入流不是有效的二进制格式。起始内容（以字节为单位）有：41-41-45-41-41-41-44-2F-2F-2F-2F-2F-41-51-41-41-41 ... 的

我所试图做的

我有3班的结构。我有一个A类是一个基类，然后B类和C这是从的。

I have a structure with 3 classes. I have a class A which is a base class, and then class B and C which are derived from A.

我想随机存储B型和C在使用LINQ to SQL数据库，与类型VARCHAR（MAX）列。作为长度约为15.000我不能使用二进制。

I am trying to store random types of B and C in the database using LINQ to SQL, in a column with the type VARCHAR(MAX). I cannot use BINARY as the length is around 15.000.

我的code ...

错误是在最后$ C $使用cblock

Error is in the LAST codeblock

的商务C＃code的第一层存储记录的

private void AddTraceToDatabase(FightTrace trace) { MemoryStream recieverStream = new MemoryStream(); MemoryStream firedStream = new MemoryStream(); MemoryStream moveStream = new MemoryStream(); BinaryFormatter binaryFormatter = new BinaryFormatter(); binaryFormatter.Serialize(recieverStream,trace.Reciever); binaryFormatter.Serialize(firedStream,trace.FiredBy); binaryFormatter.Serialize(moveStream,trace.Move); string reciever = Convert.ToBase64String(recieverStream.ToArray()); string fired = Convert.ToBase64String(firedStream.ToArray()); string move = Convert.ToBase64String(moveStream.ToArray()); this.dataAccess.AddFightTrace(trace.TraceType.ToString(),reciever,move,fired,trace.DateTime,this.FightId); }

的 C＃code在数据访问层 - 存储记录的

public void AddFightTrace(string type, string reciever, string Move, string firedBy, DateTime firedAt, int fightid) { GameDataContext db = new GameDataContext(); dbFightTrace trace = new dbFightTrace(); trace.TraceType = type; trace.Reciever = reciever; trace.Move = Move; trace.FiredBy = firedBy; trace.FiredAt = firedAt; trace.FightId = fightid; db.dbFightTraces.InsertOnSubmit(trace); db.SubmitChanges(); }

的 C＃code获得在数据库中的条目的

public List<dbFightTrace> GetNewTraces(int fightid, DateTime lastUpdate) { GameDataContext db = new GameDataContext(); var data = from d in db.dbFightTraces where d.FightId==fightid && d.FiredAt > lastUpdate select d; return data.ToList(); }

的 C＃工厂，从LINQ转换为SQL类我的对象的

这是这里的错误出现。

public FightTrace CreateTrace(dbFightTrace trace) { TraceType traceType = (TraceType) Enum.Parse(typeof(TraceType), trace.TraceType); BinaryFormatter formatter = new BinaryFormatter(); System.Text.UTF8Encoding enc = new System.Text.UTF8Encoding(); MemoryStream recieverStream = new MemoryStream(enc.GetBytes(trace.Reciever)); recieverStream.Position = 0; MemoryStream firedStream = new MemoryStream(enc.GetBytes(trace.FiredBy)); firedStream.Position = 0; MemoryStream movedStream = new MemoryStream(enc.GetBytes(trace.Move)); movedStream.Position = 0; // THE NEXT LINE HERE CAUSES THE ERROR NPC reciever = formatter.Deserialize(recieverStream) as NPC; Player fired = formatter.Deserialize(firedStream) as Player; BaseAttack attack = formatter.Deserialize(movedStream) as BaseAttack; FightTrace t = new FightTrace(traceType,reciever,attack,fired); t.TraceId = trace.FightTraceId; t.DateTime = trace.FiredAt; return t; }

因此​​，当第一Deserialize方法运行时，与上述错误的错误happends

So the error happends when the first Deserialize method is run, with the above error.

我已经试过几件事，但我完全迷失在这一个。

I have tried several things but I am quite lost on this one..

谢谢！ ： - ）

推荐答案

我觉得从丁文的base64为字节后面是错误的。

I think the coversion back from base64 to bytes is wrong.

试试这个：

var bytes = Convert.FromBase64String(base64);

=>

MemoryStream recieverStream = new MemoryStream(Convert.FromBase64String(trace.Reciever)); NPC reciever = formatter.Deserialize(recieverStream) as NPC;